Evaluation of potential bias in observing fish by a DIDSON acoustic camera

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F14%3A00428799" target="_blank" >RIV/60077344:_____/14:00428799 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.fishres.2014.02.031" target="_blank" >http://dx.doi.org/10.1016/j.fishres.2014.02.031</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.fishres.2014.02.031" target="_blank" >10.1016/j.fishres.2014.02.031</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evaluation of potential bias in observing fish by a DIDSON acoustic camera

Popis výsledku v původním jazyce

The DIDSON multi-beam sonar has become a popular tool for monitoring fish. The aim of this study was to determine how well the DIDSON sonar can detect and measure fish during stationary applications in lakes. Cyprinid fish of known sizes (10?60 cm long)and with horizontal body orientations were deployed in known positions at two ranges (6.3 and 9.5 m) within a DIDSON high-frequency array of beams. A new method for estimating fish length from multi-beam sonars was thus developed and applied. At both ranges, all the deployed fish were invariably detected when they were aligned with their sides perpendicular to the beam. Increasing fish body angle, however, reduced the ability of the system to detect fish. Only the largest fish were detectable when the fish were parallel to the beam (head or tail aspect).The estimated fish length agreed well with the actual length when the fish were positioned perpendicular to the center of the multi-beam array. The lengths were underestimated for fish t

Název v anglickém jazyce

Evaluation of potential bias in observing fish by a DIDSON acoustic camera

Popis výsledku anglicky

The DIDSON multi-beam sonar has become a popular tool for monitoring fish. The aim of this study was to determine how well the DIDSON sonar can detect and measure fish during stationary applications in lakes. Cyprinid fish of known sizes (10?60 cm long)and with horizontal body orientations were deployed in known positions at two ranges (6.3 and 9.5 m) within a DIDSON high-frequency array of beams. A new method for estimating fish length from multi-beam sonars was thus developed and applied. At both ranges, all the deployed fish were invariably detected when they were aligned with their sides perpendicular to the beam. Increasing fish body angle, however, reduced the ability of the system to detect fish. Only the largest fish were detectable when the fish were parallel to the beam (head or tail aspect).The estimated fish length agreed well with the actual length when the fish were positioned perpendicular to the center of the multi-beam array. The lengths were underestimated for fish t

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BI - Akustika a kmity

OECD FORD obor

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Projekt

<a href="/cs/project/EE2.3.20.0204" target="_blank" >EE2.3.20.0204: Centrum pro ekologický potenciál rybích obsádek nádrží a jezer</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Fisheries Research

ISSN

0165-7836

e-ISSN

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Svazek periodika

155

Číslo periodika v rámci svazku

July

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

114-121

Kód UT WoS článku

000336348400012

EID výsledku v databázi Scopus

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